diff options
Diffstat (limited to 'fwd.c')
| -rw-r--r-- | fwd.c | 73 |
1 files changed, 0 insertions, 73 deletions
@@ -34,12 +34,6 @@ #include "arp.h" #include "ndp.h" -/* Ephemeral port range: values from RFC 6335 */ -static in_port_t fwd_ephemeral_min = (1 << 15) + (1 << 14); -static in_port_t fwd_ephemeral_max = NUM_PORTS - 1; - -#define PORT_RANGE_SYSCTL "/proc/sys/net/ipv4/ip_local_port_range" - #define NEIGH_TABLE_SLOTS 1024 #define NEIGH_TABLE_SIZE (NEIGH_TABLE_SLOTS / 2) static_assert((NEIGH_TABLE_SLOTS & (NEIGH_TABLE_SLOTS - 1)) == 0, @@ -249,73 +243,6 @@ void fwd_neigh_table_init(const struct ctx *c) fwd_neigh_table_update(c, &mga, c->our_tap_mac, true); } -/** fwd_probe_ephemeral() - Determine what ports this host considers ephemeral - * - * Work out what ports the host thinks are emphemeral and record it for later - * use by fwd_port_is_ephemeral(). If we're unable to probe, assume the range - * recommended by RFC 6335. - */ -void fwd_probe_ephemeral(void) -{ - char *line, *tab, *end; - struct lineread lr; - long min, max; - ssize_t len; - int fd; - - fd = open(PORT_RANGE_SYSCTL, O_RDONLY | O_CLOEXEC); - if (fd < 0) { - warn_perror("Unable to open %s", PORT_RANGE_SYSCTL); - return; - } - - lineread_init(&lr, fd); - len = lineread_get(&lr, &line); - close(fd); - - if (len < 0) - goto parse_err; - - tab = strchr(line, '\t'); - if (!tab) - goto parse_err; - *tab = '\0'; - - errno = 0; - min = strtol(line, &end, 10); - if (*end || errno) - goto parse_err; - - errno = 0; - max = strtol(tab + 1, &end, 10); - if (*end || errno) - goto parse_err; - - if (min < 0 || min >= (long)NUM_PORTS || - max < 0 || max >= (long)NUM_PORTS) - goto parse_err; - - fwd_ephemeral_min = min; - fwd_ephemeral_max = max; - - return; - -parse_err: - warn("Unable to parse %s", PORT_RANGE_SYSCTL); -} - -/** - * fwd_port_map_ephemeral() - Mark ephemeral ports in a bitmap - * @map: Bitmap to update - */ -void fwd_port_map_ephemeral(uint8_t *map) -{ - unsigned port; - - for (port = fwd_ephemeral_min; port <= fwd_ephemeral_max; port++) - bitmap_set(map, port); -} - /* Forwarding table storage, generally accessed via pointers in struct ctx */ static struct fwd_table fwd_in; static struct fwd_table fwd_out; |